# 200 200 350 triangle

### Obtuse isosceles triangle.

Sides: a = 200   b = 200   c = 350

Area: T = 16944.30221397
Perimeter: p = 750
Semiperimeter: s = 375

Angle ∠ A = α = 28.95550243719° = 28°57'18″ = 0.50553605103 rad
Angle ∠ B = β = 28.95550243719° = 28°57'18″ = 0.50553605103 rad
Angle ∠ C = γ = 122.0989951256° = 122°5'24″ = 2.1310871633 rad

Height: ha = 169.4433021397
Height: hb = 169.4433021397
Height: hc = 96.82545836552

Median: ma = 266.9276956301
Median: mb = 266.9276956301
Median: mc = 96.82545836552

Inradius: r = 45.18548057058
Circumradius: R = 206.5599111798

Vertex coordinates: A[350; 0] B[0; 0] C[175; 96.82545836552]
Centroid: CG[175; 32.27548612184]
Coordinates of the circumscribed circle: U[175; -109.7354528142]
Coordinates of the inscribed circle: I[175; 45.18548057058]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 151.0454975628° = 151°2'42″ = 0.50553605103 rad
∠ B' = β' = 151.0454975628° = 151°2'42″ = 0.50553605103 rad
∠ C' = γ' = 57.91100487437° = 57°54'36″ = 2.1310871633 rad

# How did we calculate this triangle?

Now we know the lengths of all three sides of the triangle and the triangle is uniquely determined. Next we calculate another its characteristics - same procedure as calculation of the triangle from the known three sides SSS. ### 1. The triangle circumference is the sum of the lengths of its three sides ### 2. Semiperimeter of the triangle ### 3. The triangle area using Heron's formula ### 4. Calculate the heights of the triangle from its area. ### 5. Calculation of the inner angles of the triangle using a Law of Cosines    